铜纳米粒子的制备及在食品中H2O2残留量的测定  

Preparation of Cu NPs for detection of hydrogen peroxide residues in foods

作　　者：董哲[1] 邢天华 Dong Zhe;Xing Tianhua(Instrument equipment and laboratory management center,Inner Mongolia University for Nationalities,Tongliao 028000;Department of Pulmonary and Critical Care Medicine,Affiliated Hospital of Inner Mongolia University for the Nationalities,Tongliao 028000)

机构地区：[1]内蒙古民族大学仪器设备与实验室管理中心,通辽028000 [2]内蒙古民族大学附属医院呼吸与危重症医学科,通辽028000

出　　处：《化工新型材料》2020年第8期290-293,共4页New Chemical Materials

基　　金：内蒙古自治区自然科学基金项目(2018BS02001);内蒙古自治区高等学校“青年科技英才计划”(NJYT-19-B28);内蒙古民族大学教育教学研究青年课题(QN2018002)。

摘　　要：H2O2作为一种强氧化剂,可使机体的抗氧化能力丧失,进一步引发各种疾病。利用大蒜素的主要提取物S-烯丙基-L-半胱氨酸(SAC)为模板剂合成了铜纳米粒子(SAC-Cu NPs)。在H2O2分子存在下,能引起铜纳米粒子荧光强度明显的猝灭。凭借这种特定的响应,开发了基于SAC-Cu NPs的荧光探针,用于高灵敏和高选择性的检测H2O2含量的方法,其在0.1×10^-6 mol/L到50×10^-6 mol/L范围内有着良好的线性响应关系,检测限可达0.79×10^-7 mol/L。此外,对实际食品样品中的H2O2进行了检测,与国家标准方法的测定值一致,表明该荧光探针在环境保护及保障食品安全方面有较好的应用前景。Hydrogen peroxide(H2O2),as a strong oxidant,can make the body lose its antioxidant capacity and further cause various diseases.Copper nanoparticles(SAC-Cu NPs)were synthesized using S-allyl-L-cysteine(SAC)as template.The fluorescence intensity of copper nanoparticles can be obviously quenched by H2O2.A fluorescent probe based on SAC-Cu NPs was developed for highly sensitive and selective detection for H2O2.It had a good linear response in the range of 0.1×10^-6 mol/L to 50×10^-6 mol/L with a detection 0.79×10^-7 mol/L limit.In addition,the method in consistency with the GB method when employed to detect H2O2 in foods,which shown its great potential to effectively protect the environment and ensure food security.

关 键 词：铜纳米粒子 S-烯丙基-L-半胱氨酸 荧光探针 H2O2 检测 

分 类 号：O657.3[理学—分析化学]